Elemental Blade (5e Spell)

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You create a weapon of ice, fire, or lightning in your hand.
The weapon is similar in appearance to a short sword and lasts for the duration of the spell. If you let go of the blade, it disappears, but you can evoke it again as a bonus action.

As an action you can make a melee spell attack using the weapon, and on a hit, the target takes 3d6 damage of the either cold, fire, or lightning depending on the elemental type of the weapon.

A weapon made of ice sheds bright light for a 5-foot radius and dim light of an additional 5 feet; a weapon made of fire sheds bright light for a 10-foot radius and dim light of an additional 10 feet, and a weapon made of lightning sheds bright light for a 20-foot radius and dim light of an additional 20 feet.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, you can change the appearance of the weapon into that of 2 short swords that each inflict 3d6 of the chosen elemental damage or a great sword that inflicts 6d6 of the chosen elemental damage.